Check if there is a locally cached nameserver to send before responding

to RTP_PROPOSAL_SOLICIT.  Fixes a crash when resolvd is restarted but
no name server is set.

diff --git a/sbin/iked/vroute.c b/sbin/iked/vroute.c
index 328b0be..89a7f01 100644 (file)
--- a/sbin/iked/vroute.c
+++ b/sbin/iked/vroute.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: vroute.c,v 1.16 2022/03/16 18:17:20 tobhe Exp $       */
+/*     $OpenBSD: vroute.c,v 1.17 2022/07/18 19:32:16 tobhe Exp $       */
 
 /*
  * Copyright (c) 2021 Tobias Heider <tobhe@openbsd.org>
@@ -133,7 +133,8 @@ vroute_rtmsg_cb(int fd, short events, void *arg)
 
        switch(rtm->rtm_type) {
        case RTM_PROPOSAL:
-               if (rtm->rtm_priority == RTP_PROPOSAL_SOLICIT) {
+               if (rtm->rtm_priority == RTP_PROPOSAL_SOLICIT &&
+                   ivr->ivr_dns) {
                        log_debug("%s: got solicit", __func__);
                        vroute_dodns(env, (struct sockaddr *)&ivr->ivr_dns->vd_addr, 1,
                            ivr->ivr_dns->vd_ifidx);